<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <div style="display: flex">
      <div class="wz"></div>
      <div class="tq" style="margin-left: 8px"></div>
    </div>

    <script>
      function parseTime(time, pattern) {
        if (arguments.length === 0 || !time) {
          return null
        }
        const format = pattern || '{y}-{m}-{d} {h}:{i}:{s}'
        let date
        if (typeof time === 'object') {
          date = time
        } else {
          if (typeof time === 'string' && /^[0-9]+$/.test(time)) {
            time = parseInt(time)
          } else if (typeof time === 'string') {
            time = time
              .replace(new RegExp(/-/gm), '/')
              .replace('T', ' ')
              .replace(new RegExp(/\.[\d]{3}/gm), '')
          }
          if (typeof time === 'number' && time.toString().length === 10) {
            time = time * 1000
          }
          date = new Date(time)
        }
        const formatObj = {
          y: date.getFullYear(),
          m: date.getMonth() + 1,
          d: date.getDate(),
          h: date.getHours(),
          i: date.getMinutes(),
          s: date.getSeconds(),
          a: date.getDay()
        }
        const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
          let value = formatObj[key]
          // Note: getDay() returns 0 on Sunday
          if (key === 'a') {
            return ['日', '一', '二', '三', '四', '五', '六'][value]
          }
          if (result.length > 0 && value < 10) {
            value = '0' + value
          }
          return value || 0
        })
        return time_str
      }

      let str = parseTime(new Date(), '{y}-{m}-{d} {h}:{i}:{s}')
      console.log('当前日期', str)
    </script>
  </body>
</html>
